The STCO Instruction

Name:
STCO X,$Y,$ZSTCO X,$Y,Z

Specification:

With A ← $Y+$Z respectively A ← $Y+Z we have:
u(M8[A]) ← X

Timing:

STCO: υ + μ

Description:

Stores the one byte constant X as an unsigned octa in main memory.

The address A is rounded down, if necessary, to a multiple of 8.